700 Clicks and 1 Registration

Hi,
I am using a branding banner to advertise my website, the banner has the logo of my website and the words "Link Building Service" I have received 700 clicks and just one registration……
I am using bidvertiser as the pay per click program, so what should I do, should I change the banner? with a non branding one?
My site used to make conversions of 12% and 16% but this month is awuful :S

See original post by romioaa