In the Project Information for your VFP mtdll under the Servers tab, there's a choice for Instancing. It should be Multi-Use.
Your base class in your VFP mtdll should be defined with something like this:

Define Class mymainclass AS Session

which will define some needed settings. I also use the following commands:

SET RESOURCE OFF
SET EXCLUSIVE OFF
SET CPDIALOG OFF
SET DELETED ON
SET EXACT OFF
SET SAFETY OFF
SET REPROCESS TO 2 SECONDS

>Thanks for the reply claude, I not sure I know the answer to that...how can i find out?