Do you mean an NEC 1300a?
I have a 1300a and have had good luck with Maxell 4x and 2x -R disks made in Japan, Sony -R 4x disks made in Austria, and Verbatim Datalife +R 4x disks made in Singapore.
Taiyo Yuden 4x -R disks sold under the Fuji brand in packs of ten are also reported to be very high quality. These are made in Japan.
All of that info is important when picking media by the way. Especially country of origin.
I haven't had much luck with the ubiquitous Taiwanese disks made by Ricoh/Ritek, but haven't tried very often with them, so I may have gotten unlucky and bought poor batches. They are sold under many brands, including TDK, Memorex, Fuji, etc.
Which firmware are you using? The latest versions will help with compatibility.
Whatever disks you get, you should check their id code. Several different programs will do this for you---I use DVDInfoPro.
This week, Office Depot is having a sale on the Maxell 4x -R disks. Buy one, get one free on spindles of 15, for $27 I think. Very good price on high quality disks. The +R disks are also on sale, but the Japanese made -R's would be a better choice in my opinion.