false positive virus detect in sait.exe with Evo-Gen[susp] on Avast 7.0.1426

Hi:

Today definition of database virus of 2013.03.14 mark our program sait.exe with Evo-Gen[susp] virus.
Avast 8 does not detect it like virus.
Only Avast 7 fails
After sending sait.exe to virus trunk or quarintine, if a select detect virus, it does not detect any virus.
We are a software company in Mexico any question please call +52 (653) 534-8800.
Program is made with Microsoft Visual Studio and installer is made with Install Shield

Please Help

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Already reported, and not solved yet