audio misses starting on time

Hi, the title is a bit vague, but here is the problem

We are running FMS 4.03 (updated form 4.0) and at the same time we moved from 32 bit to 64 bit, AND we moved our app and data to the D drive

we stream (we have radio stations across the globe) by people out at a high quality.

since the move, the songs, promos, etc do not start at the start. Sometimes they are okay, but for many it misses the first few seconds - or as people now describe it as a 'hicup'.

went through the forum/help and increased the chunk size (from 4096 to 8192) in FMS.ini, and the cache flv size (from 500 to 2000) in Applications.xml

but it is 'still' happening.

any help wopuld be appreciated.

also if there is someone who is good at FMS and is very reasonable in charging as we are strapped for cash that can look at what we are dong that would also be great.