Application consuming server memory when trying to instantiate an object on deployed server

I have written an vb.net forms 2.0 application solution that runs fine on my laptop.

It contains 5 projects.

I have copied the .exes and DLLs over to the server.

When I run my .exe (either by double click or from command line) it runs ok until the point it needs to create a new object.

The code in Project1 => Dim x as new project2classpath.invoice

(invoice class is in project2)

At this point it dosent get past my new instruction but eats up all the server memory until out of memory exception is thrown.

Any ideas what could be causing this not to work on the server?

Could it be a problem with my namespaces between the projects, the assembly version numbers of my projects etc?

Any ideas?

thanks.