CVS Compare Problem

Hello,
I'm using JDev 10.1.0.3.4.3673 and CVSNT2.0.8
When I try to compare a file with another revision, the left filter defaults to the previous revision, and the right filter defaults to the head revision, but underneath the two filters where I expect to see the two source files and the differences from the comparison I just see a white background with the message 'Compare Not Available'.
Does anybody have any suggestions how to solve this? Am I doing something wrong? This is really a show stopper for me.
JFYI If I use the feature 'Compare With Other File', it works as expected. But of course my goal is to compare with other CVS revisions to see what changes a colleague has made.

Thanks again for your help.
I see this problem on all files that I try to compare from CVS. Below is the ouput from 'cvs log' from the command prompt for an example file. The date format is exactly as you described:
RCS file: /local/reps/acc-dm/measdb/measdb-client-api/src/java/cern/measurement/MeasurementManager.java,v
Working file: MeasurementManager.java
head: 1.10
branch:
locks: strict
access list:
symbolic names:
V2_0_1: 1.10
V2_0_0: 1.10
V1_5_14: 1.9
V1_5_13: 1.9
V1_5_12: 1.9
V1_5_11: 1.9
V1_5_10: 1.7
V1_5_9: 1.6
V1_5_8: 1.6
V1_5_7: 1.6
V1_5_6: 1.6
V1_5_5: 1.6
V1_5_4: 1.6
V1_5_3: 1.5
V1_5_2: 1.5
V1_5_1: 1.5
V1_5_0: 1.4
V1_4_0: 1.3
V1_3_0: 1.2
V1_2_1: 1.1.1.1
V1_2_0: 1.1.1.1
V1_1_0: 1.1.1.1
V1_0_1: 1.1.1.1
V1_0: 1.1.1.1
arelease: 1.1.1.1
avendor: 1.1.1
keyword substitution: kv
total revisions: 11; selected revisions: 11
description:
revision 1.10
date: 2006-06-08 15:06:32 +0000; author: konkere; state: Exp; lines: +172 -107; commitid: lnQP1pTMGnOrhdAr;
JMON-52.
Refactoring to generalize the fundamental and measurement variable behaviour and handling
revision 1.9
date: 2006-04-07 09:57:02 +0000; author: cdroderi; state: Exp; lines: +76 -16; commitid: AiECvh7J3qGRydsr;
New Fundamental Variable Features, and SavedVariableList for integration with
Set Of The Day.
revision 1.8
date: 2006-01-25 18:19:54 +0000; author: cdroderi; state: Exp; lines: +3 -4;
Added additional debug information to verify clearing of timeseries data
revision 1.7
date: 2006-01-17 14:33:53 +0000; author: cdroderi; state: Exp; lines: +29 -0;
[no comments]
revision 1.6
date: 2005-09-15 20:12:15 +0000; author: cdroderi; state: Exp; lines: +0 -0;
[no comments]
revision 1.5
date: 2005-09-12 08:01:07 +0000; author: cdroderi; state: Exp; lines: +2 -2;
Extended MetaVariableSet extraction using MetaHierarchy to include all nodes under the node represented by the given hierarchy.
revision 1.4
date: 2005-08-30 21:13:04 +0000; author: cdroderi; state: Exp; lines: +24 -3;
Limited the variable ownership and registration checks to once per session unless variables are added or removed from a variable set.
revision 1.3
date: 2005-08-30 14:25:10 +0000; author: cdroderi; state: Exp; lines: +50 -3;
New methods to read MetaVariableSet objects using a given MetaVariable name pattern or MetaHierarchy to filter the size of the returned set.
revision 1.2
date: 2005-08-23 14:16:25 +0000; author: cdroderi; state: Exp; lines: +19 -15;
Bug fix for writing data for variables with no time series data. Merge data when duplicates are found.
revision 1.1
date: 2005-06-01 17:52:43 +0000; author: cdroderi; state: Exp;
branches: 1.1.1;
Initial revision
revision 1.1.1.1
date: 2005-06-01 17:52:43 +0000; author: cdroderi; state: Exp; lines: +0 -0;
no message
=============================================================================

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hello all please find query as below :
/* program to alter the ordering of the elements in the collection class TREESET
class Demo1 overrides compare() of Comparator interface
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when 'return b1.compareTo(a1);' is used then the program output is as
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when 'return a1.compareTo(b1);' is used then the program output is as
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Per the java docs:
public interface Comparable
This interface imposes a total ordering on the objects of each class that implements it. This ordering is referred to as the class's natural ordering, and the class's compareTo method is referred to as its natural comparison method.
Lists (and arrays) of objects that implement this interface can be sorted automatically by Collections.sort (and Arrays.sort). Objects that implement this interface can be used as keys in a sorted map or elements in a sorted set, without the need to specify a comparator.
A class's natural ordering is said to be consistent with equals if and only if (e1.compareTo((Object)e2)==0) has the same boolean value as e1.equals((Object)e2) for every e1 and e2 of class C.
It is strongly recommended (though not required) that natural orderings be consistent with equals. This is so because sorted sets (and sorted maps) without explicit comparators behave "strangely" when they are used with elements (or keys) whose natural ordering is inconsistent with equals. In particular, such a sorted set (or sorted map) violates the general contract for set (or map), which is defined in terms of the equals operation.
For example, if one adds two keys a and b such that (a.equals((Object)b) && a.compareTo((Object)b) != 0) to a sorted set that does not use an explicit comparator, the second add operation returns false (and the size of the sorted set does not increase) because a and b are equivalent from the sorted set's perspective.
Virtually all Java core classes that implement comparable have natural orderings that are consistent with equals. One exception is java.math.BigDecimal, whose natural ordering equates BigDecimals with equal values and different precisions (such as 4.0 and 4.00).
For the mathematically inclined, the relation that defines the natural ordering on a given class C is:
{(x, y) such that x.compareTo((Object)y) <= 0}.
The quotient for this total order is:
{(x, y) such that x.compareTo((Object)y) == 0}.
It follows immediately from the contract for compareTo that the quotient is an equivalence relation on C, and that the natural ordering is a total order on C. When we say that a class's natural ordering is consistent with equals, we mean that the quotient for the natural ordering is the equivalence relation defined by the class's equals(Object) method:
{(x, y) such that x.equals((Object)y)}.

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