I am using nokia PC suite 6.1.008 with infrared connectivity on my WindowsXP machine.
I AM able to do file transfers to the 'gallery' directory on my 6610i phone.
I am NOT able to install any java application. The PC suite's application installer does not recognise the application jar file on my PC. I have tried a lot of jar files (all MIDP1.0, CLDC1.0) but none of them is recognised by the PC suite as a valid 6610i application.
If I try a direct file transfer from the OS (without using PC suite) I get an 'error occured' "The data is invalid"
Me too had some problem while trying to transfer .JAR file to my 6610i from my PC using IR.
So what I suggest you is to transfer it by using a data cable (DKU-5) and PC suite.Its working fine for me.I suppose using datacable is much easy!!
The sad part is, I will have to BUY that cable as it doesn't ship with the phone. It is frustrating to see the infrared working perfectly fine for all photos, etc but not for app (jar) files.
I have one more pointer, may be the PC suite version I am using is not compatible with my 6610i, I will try the latest 6.5 version before I spend on the DKU5 cable.