Can Access some folders, not others

I have an "EntCent" pc in the lounge. IT records and TV and has DVD sand CDs stored on it.

I want to be able to stream TV and DVDs etc to other PCs on the LAN. They all use Win 7 home prem SP1.

I have set up to be able to see the Lounge TV from my workroom PC. I have made sure I shared both the DVD folder and the Recorded TV folder, to the Homegroup, read/write. There is a LAN password, but the folders are shared without any further encryption.

I can see Recorded TV, but I am told I do not have access to DVD.

As far as I can see they are identical regarding permissions. Is there anything I should be looking at?

EDIT: I will add that I have tried opening the DVD folder in Win Explorer, and also tried adding it as a folder in WMPlayer, by selecting it as a network multimedia device. I can add the folder but then WMPLayer says it cannot access the folder. Both methods above work on the Recorded TV folder on the Lounge Machine

EDIT: I shared the whole drive and then they were both accessible. But I should not have to do that right?

Thanks for any help

Oh well. Doesn't matter now. Having started out with a good data transfer rate, after I tried sharing stuff the network reverted to 1MB/s and I can barely stream video, let alone copy big files.

I do not ask for help on this matter, as I have tried every suggestion over months to make Win 7 networking work.

w7 networking sucks AFAICS. It's pretty disgusting.