Waiting for Professional Clearance

Hello,

I have recently set up on my own and have taken on a client from a firm I worked for 3 years ago.  I have written to them (beginning of May) for professional clearance and I know that the client has written to them to inform them of his decision and give permission to send me information.  However, I have heard nothing in response.  I chased with a letter last week and still nothing.

There was nothing in my contract that would stop me approaching clients and it has been 3 years!! 

Could anyone give me any advice on how you might proceed from here?

Thanks for your help,

Mel