Random Error (Transaction Not enlisted) using MTS ASP and IIS5

[Vince]

I have written several components to talk to an SQL server 7 DB which run on Transaction server. These components are called via ASP. This was tested on accross our local network and worked fine, but as soon as it was moved onto the ISP system it does not create the connection waith the DB correctly and returns no records
I have ruled out the code and the database as being responsible for the problem so that leaves the network or some thing to do with transaction server or possibly something to do with DCOM

Any help would be greatly appreciated