>One of our infrastructure on a client site includes a .NET Web Service which uses VFP and WWC for the data tier. Today, a top IT in regards to the management of that infrastructure says that this solution is not scalable. They said to us that a global .NET solution is scalable. How do we react to that?

Has this person seen some limit that is hurting the business?

Has this person seen projections for future business that make him worry and, if so, how has he concluded that the current infrastructure can't handle it??

As usual, this sounds far more like MS .NET "case study" reading - with all of the FUD that is mandatorily included in such diatribes - than any kind of actual FACT.

Bonne chances