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[ :((] I BOUGHT A SONY EXT DVD-RW DRIVE WHICH I HAVE ONLY USED ONCE BEFORE BUT HAVE NOW RECORDED NEW DVD THRU "MYDVD" BUT I CANNOT BURN TO DVD AS I GET AN ERROR MSG WHICH READS " H:\ IS NOT ACCESSIBLE , SPECIFIED NETWORK RESOURCE IS NOT AVAILABLE " ANY IDEAS WHY THIS HAS HAPPENED. THE ONLY THING I'VE DONE IS CONNECT DRIVE VIA iLINK CABLE TO REAR OF PC. PLEASE HELP:smileycry: 
Restart the PC with the device not plugged in, then plug it in and see if that works.
I had a similar thing with a CD-RW
And if that doesn't work then try deleting the IEEE1394 device from device manager. Reboot to allow the drivers to reinstall.
MANY THANKS KEE-LO- IT WORKED A TREAT. THANKS FOR REPLY AS WELL ROB.
MANY THANKS.
GIGGSY:smileyhappy:
No problem