Default HTC sync manager problems

Hey Guys,

I rooted and put a custom ROM on my phone - using TWRP and my phone is S-ON - I used the OMNI rom 4.4 KK.

So my computer recognizes my htc ONE but HTC sync manager wont recognize it. How can i fix this?

I upgraded to 4.3 via ATT first and then rooted and put the custom rom.

Thanks for your help