ACE Report problem

Hello,
I migrate my informix from 9.40UC6 to 11.70.FC7GE (GrowthED)
everything works well, but not ACE Report.
4GL works fine (doing export import of my syspgm4gl database)

I did some modification on a pair of ACE reports, and I detect that switching some variables data type the report works fine.
It´s a HARD work to do that on any of hundred reports, but it´s a way to resolve one of two problem I have.
The other problem it´s "skip to top of page" sentences, this sentences erase any print made before on report.

I think that it´s another "simple" way to resolve my problem,I hope someone could help me.

Thank you very much

Julio Falcón