connectivity issues between ATTWS and

Hi all, we are having some issues with users attempting to reach our
public netblocks via ATTWS. Our advertised ranges appear to be
completely unreachable from their wireless network. The verifies our netblocks are seen and reachable,
but this probably has something to do with the cingular network
infrastructure. Connections via other providers- tmo, etc, all work

We are attempting to contact attws for support, but aren't making it
beyond the 'is your ipsec client configured properly?' Could a
clueful engineer please contact me off-list at their earliest

Thanks kindly