>Thanks for help.
>But in general, why a client would not use an application pooling?

Because it uses resources on the server that may be needed for something else.

>It will create as many instances as it's set in a pool size and then simply will not run the component. Is it becasue my VFP code is not written properly?
>

Nope. VFP components can't be pooled because they are not thread neutral. Same is true for VB 6.0.