getting KErrNotReady when trying to reopen an RSocket object

Hi,
at first when I try to open the RSocket - I succeed, but from then on I fail every time - the open function returns the error code
KErrNotReady.

the sequence that I use from 1 open call to another is :

iSocket.open()
iSocket.CancelAll();
iSocket.Close();

thanks in advance,

Uri