Authorize.net not redirecting to site

[zohab]

hi all,

 

I am using Authorize.net payment method in my site.

 

I am getting following error message after checkout conformation page .I am getting mail of order i had placed and it is

saying that payment is confirmed but not redirecting to my site.

 

I am using Authorize.net payment method in test mode.

 

some days before it is working ,now suddenly it is start giving error .

 

I am not getting what is the problem.

 

An error occurred while trying to report this transaction to the merchant. An e-mail has been sent to the merchant informing them of the error. The following is the result of the attempt to charge your credit card.

 

This transaction has been approved.

 

It is advisable for you to contact the merchant to verify that you will receive the product or service.

 

 

 

any ideas?

 

thanks in advance and best regards

zohaib