I am having the exact problem.  Using MamboSMFForum_1.3.2b1 and my host runs ISS servers.

Has anyone figured out what the problem with this is yet?

Gary

I have the same problem when I use menu link pointing to the mambo smf component. However when i access the board via a wrapper link its fixed.

I was having that problem as well.  It was calling my default mambo template instead of my SMF template.

I tried changing the name of my smf template but that didn’t work.

Finally I gave up and made a wrapper link to the directory where SMF is located.  That solved the template not found problem however this won’t work well for those of you running mambo 4.5.2+ as the wrapper is not very reliable.  Intact I had to downgrade mambo to 4.5.1b to make things work smoothly. 

Best of luck and if any of you need the 4.5.1b zip let me know, I think I have it lying around somewhere.

My setup is as follows:
W2k3 server IIS6
Mambo version: 4.5.1b, I had the same problem with version 4.5.2.3