Billdesk — Unable to Pay

I am trying to pay SBI card for the last two day through Netbanking. After filling the card number etc and choosing the bank when I hit the pay button it goes to "redirecting to bank" but the bank payment screen never appears. I have tried it with two banks where I have the nebanking facility but the same problem occurs. I think Billdesk redirecting software is faulty. The netbanking of these two banks works well if not coming through Billdesk.