"Please wait" problem on SagePay payment submit

Hi All.

I am using version 1.4.9.1 of OC. I am getting the "Please wait" message and when submitting payments to the SagePay payment processor (SagePay module, not 'SagePay Direct' or 'SagePay US' modules). The payment is being accepted by SagePay, but for some reason the success information does not seem to be returned to the OC website. In this situation my customers will wait a few minutes and then click the confirm/submit button again, which then results in another sale (I am having to do about one to two 'VOID SALE' or 'REFUND' actions on SagePay for each actual sale). I have search on this forum and seen the various postings and recommended solutions for other payment processors, but none addressing the SagePay payment processor directly, and the version of OC I am using contains the recommended code changes.

Anyone with any sage advice (pun intended).
Thanks.

Have you used are free search on "please wait"?

This issue has been discussed several times.

HI i2Paq. And thanks for the reply.
I have done a search and have looked at the suggested solutions. While none directly deal with SagePay, all recommended code changes are already in my version of OC. So I'm still looking for other solutions.
Thanks.