Vray image sampler settings not saved!

Hi ,
i am working with vray 1.5 sp2 , it seems that the image sampler settings , in either mode ( fixed , adaptative or DMC ) are working fine , but when i save my scene and load it back , all the settings are back to "factory settings " ( adaptative -1/2 random samples check on etc).
Can’t save the settings with the presets otpion for max or vray…
Anybody got this before ?
thx

I think it’s limitation of the demo version, it resets to default when saving.

yes, it is