Invalid credentials...?

Hello fellow pocketcloud'ers

I have just installed pocket cloud to my ipad and my windows 7 home premium, everything has installed correctly and the ipad shows my pc. Once I try to connect with my gmail account (same as initial registration) I get the floating box that tells me I have entered invalid credentials. I have checked, checked and checked again that I am entering the said details correctly and still the message comes.

What am I doing wrong?

Thanks kindly

Ray