Unable to read the source URL error for cffeed

Question

Hi,
I am using the cffeed to read from my twitter RSS feed but I get this error:
Unable to read the source URL.
Status Code: 400. Try adding or changing UserAgent attribute in the CFFeed tag
My code is:
<cfset feedurl="http://twitter.com/statuses/user_timeline/somenumbers.atom" />
<cffeed 
source="#feedurl#"
properties="feedmeta"     
query="feeditems1" overwrite="true" />
It works but suddenly it stops and it takes time about 15 minutes or more  to work again.
Can any body help me with this?
Thanks,
Mandana

Answer 1

One thing which I did not mentioned is I want to have 6 pages rss feed together and I made it like this:
<cffeed 
    source="#feedurl1#"
    properties="feedmeta"
    query="feeditems1" overwrite="true"
    useragent="Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; WOW64; Trident/4.0; GTB6.6; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET4.0C; AskTbBLPV5/5.11.3.15590)" />
   <cffeed
    source="#feedurl2#"
    properties="feedmeta"
    query="feeditems2" overwrite="true"
    useragent="Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; WOW64; Trident/4.0; GTB6.6; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET4.0C; AskTbBLPV5/5.11.3.15590)"/>
I did it for 6 pages, each one with one cffeed and then:
<cfquery name="feeditemstotal" dbtype="query">
    select * from feeditems1
    union
    select * from feeditems2
    union
    select * from feeditems3
    union
    select * from feeditems4
    union
    select * from feeditems5
    union
    select * from feeditems6
  </cfquery>