closing the deal

Now my question is based a closure…recently we were awarded distributorship for a thin client solution based on ncomputing solution/prduct i have approched prospective clients including banks ,corporates and various diverse firms .I was finally invited for demos withseveral of this firms and one of them actually invited us for 3 demos accepted to award us the tender to supply…now here is where the problem comes…..they have been dragging there feet for 1month and the CIO ASSURINGLY TELLS MY COMPANY THAT WE SHALL GET THE AWARD LETTER…I have pushed in vain….ADVICE