Access Denied Error in TN

Hi,
We have two wM Integration Servers using the same TN database. When I try to access the TN from Solutions under Administrator, I am successful for one server. For the other server I get this exception

class com.wm.app.b2b.server.AccessException
[B2BSERV.0084.9004] Access Denied

Any ideas why this would be happening? I tried changing the ACL to no avail.
Thanks in advance.