Problems when Model Deploy

Hi, my Name is Wilmer Figueroa, i'm a WAS Developer's and at the moment we are proving GuiMachine like tool for development of iViews fast, but we are presenting a problem when we make the Deploy of the Model towards the Portal..the error message says the following thing: Portal request Failed (Bad or missing XML

Object)

Then please tell me What we can to do?

Thanks a lot.