Error while creating a branch

Hi,

I have configure CVS for my roject which lies in a secured network. I 
am able to update and commit, but when It ried to create a branch 
from the repository it gives me the following error

***

cvs 
tag "/MergeCode_4Jun07/Root_CVS" "/MergeCode_4Jun07" "/MergeCode_4Jun0
7"

failed due to an internal error (took 40:47.240)

   Error: I/O has been interrupted.

      Error: The most likely cause of the interrupt is either an 
intermittent network failure or a communications timeout.

      Error: The CVS communications timeout can be adjusted in the 
Team/CVS preferences.

      Error: Another possible cause is the improper configuration of 
the "ext" connection method.

      Error: The "ext" connection method can be configured on the 
Team/CVS/EXT Connection Method preference page

***



Please help, it is very urgent



 
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