Unable to do test transaction through sand

[mateeb4u]

I m trying authorize.ne test transaction  to my local host computer 

i complete all the steps and try to complete the transaction after clicking the buy Button issue is

Text Displayed:

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 cannot be accepted

i am searching on this topic but still unable to find any solution

the test mode is enabled,and login ID and Transaction ID is correct

thanks 

and message to my mail is:

**Please DO NOT REPLY to this message. E-mail developer@authorize.net if you have any questions.

Authorize.Net Developer Center Merchant,

Your script timed out while we were trying to post transaction results to it.
   Transaction ID: 0

Transaction Result: This transaction has been approved.

[RaynorC1emen7 · Accepted solution]

Are you using localhost for the relay response? Use the checklist in

Relay Response Basics and Troubleshooting

And turn off testmode on the sandbox account. If not it will not create test transaction, which is why you are getting 0

 Transaction ID: 0

[mateeb4u]

thanks for this,

by turing off the test mode ,transaction goes to approved ,but time out issue is still exists i m working on it

[RaynorC1emen7]

If you are using asp.net, set the EnableViewStateMac="false"  on the page