HTC 8XT

I bought my HTC 8XT last week and I am mostly happy with it so far (although I Would really like that Lumia 1020 camera!) I put an old microSDXC card in (2GB) put some music on it and it worked fine. Then after a few days I picked up a 64 GB micros\SDXC card since the specs say it can take up to a 64 GB XC card. Copied my music onto it and the next day while driving along the music kept skipping and glitching. Somebody suggested trying different apps.. So I took it home and tried it on my WIn 8 pc and used the Nokia Music app and the Zune app and the music played fine. Tried the Xbox music app on the PC and go the same glitch results. Does anybody know what could be causing this incompatibility? Does MS need to fix a glitch in the Xbo...
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