Varchar(Max) field cutting off data after 8000 characters SQL Server 2008

Question

Hi,
We have a scenario on which we are preparing the SQL query dynamically by string concatenat and then at the end EXECUTING the query using EXECUTE statement but observed that the VARCHAR(MAX) data type is not storing more then
8000 character.
Here is the code snip.How i am using and where the variable is not storing more them 8000 character
We have a table "tblUserAssignedResourcesData" where we are storing "FilterType" and "FiletrValue" and then preparing the string like this:
DECLARE @sqlQuery_UR VARCHAR(MAX)   
SET @sqlQuery_UR=''
DECLARE @agentsColumns_UR VARCHAR(MAX)             
SELECT @agentsColumns_UR = ISNULL(@agentsColumns_UR,'') +''''+ FilterValue + ''''+',' FROM @tblUserAssignedResourcesData Where FilterType = 1             
SELECT @agentsColumns_UR = LEFT(@agentsColumns_UR,LEN(@agentsColumns_UR)-1)             
SET @sqlQuery_UR=@sqlQuery_UR+'[UserAgent] in('+ @agentsColumns_UR +')'
--Upto this all the Agents are storing properly then adding mobility user
DECLARE @mobilityColumns_UR VARCHAR(MAX)            
SELECT @mobilityColumns_UR = ISNULL(@mobilityColumns_UR,'') +''''+ FilterValue + ''''+',' FROM @tblUserAssignedResourcesData Where FilterType = 3               
SELECT @mobilityColumns_UR = LEFT(@mobilityColumns_UR,LEN(@mobilityColumns_UR)-1)
SET @sqlQuery_UR=@sqlQuery_UR +' or '+'[MobilExtensionID] in('+@mobilityColumns_UR+')' 
print '@sqlQuery_UR ->' + @sqlQuery_UR
--Print statement should print all the Agents and Mobility values but it is not printing and hence my SQL query is faling to execute
Anyhelp will be appriciable
Thanks,
Bijay

Answer 1

Whats the value of @mobilityColumns_UR  before the below statement? This would give you
some idea.
--Upto this all the Agents are storing properly then adding mobility user
DECLARE @mobilityColumns_UR VARCHAR(MAX)             
SELECT @mobilityColumns_UR = ISNULL(@mobilityColumns_UR,'') +''''+ FilterValue + ''''+',' FROM @tblUserAssignedResourcesData Where FilterType = 3               
SELECT @mobilityColumns_UR = LEFT(@mobilityColumns_UR,LEN(@mobilityColumns_UR)-1)
print '@mobilityColumns_UR  ->'
+ @mobilityColumns_UR