SUS error

I have been running the SUS service for about 2 months
with no problem. Today i recieved the following error
message in regards to not being able to sync with the
Windows update site "The catalog file downloaded
from 'http://www.msus.windowsupdate.com/msus/v1/aucatalog1.
cab' has a missing or invalid digital signature"
Not sure why this is happening, any ideas?

I just came from the Microsoft SUS newsgroup and was able
to fix the problem. Others had similiar issues to the one
i was having and after typing in the full url described
below i was able to download the cab, overwrite the old
one, and perform a successful sync.
>-----Original Message-----
>I have been running the SUS service for about 2 months
>with no problem. Today i recieved the following error
>message in regards to not being able to sync with the
>Windows update site "The catalog file downloaded
>from 'http://www.msus.windowsupdate.com/msus/v1/aucatalog1
..
>cab' has a missing or invalid digital signature"
>Not sure why this is happening, any ideas?
>.
>