You can read 2hr Liteon disks with a PC (I do it all the time).
Could be several reasons why you are not working:
1) Have you finalised the DVD first. This is necessary for record once only disk (+R). This is not needed for +RW disks.
2) the PC simply does not like the DVD media you are using. Try different disks. Try upgrading firmware of burner.
3) Is your PC burner in DMA mode. If not you will get a lot of read errors. I am not a great expert here on how to check/solve this. Search forums for more information.