When you install Fox Pro 2.5 on a Macintosh computer, the Apple Shared Library Manager (ASLM) software is also installed. This causes a problem if you are running AppleShare 4.0 or Apple Internet Router (AIR) 3.0, which uses ASLM version 1.0. AppleShare File Server fails to initialize because of an incompatible version of Apple Shared Library Manager. The Router may fail to initialize for the same reason, only if the SNMP extensions are installed, as this is the only part of the Router that uses ASLM.
The solution is to upgrade to AppleShare 4.0.1 or AIR 3.0.1, which provides compatibility with ASLM version 1.1. Fox Pro, Internet Router, and AppleShare Server can then co-exist using a single version of ASLM.