Is there any reason why you are trying to stick with unsupported version. QV10 is 7 years old and is not supported anymore.
What is the reason that you are not willing to use QV 11 (or should i say QV 12) to run as a client for your reports?
Interestingly how did you manage to install both version on your computer. That is also not supported configuration.
knowing the reasons would be good as maybe there is a different solution to yor problem.