Fryingpan dvd non copyable on pc

[amiga4001]

I burned a datadvd witch contains a dir with a lot off files and a few subdirs.
Burning went allright and after burning I tested to see I could acces these files on my peg2..ok.
Even copying etc is ok on the pegasos.
Then I wanted to copy the contains from the dvd onto the harddisk from the xp pc.
I can read the dvd ok and also I am able to copy single files but there are a lot of dir's which won't let them copy themselves.
Pc says unable to read from source..
Also information off these files on pc says read only if that makes a difference?
Pegasos tells me files are readable writeable..
Please some advice.
Latest Fpan with key btw and +DVD.

[amiga4001]

It's a root dir containing 3259 subdirs and 51687 files.
Subdirs also contain a lot off files.

I also tried an other dir much smaller same problem.
As soon as I pack the dir into one file (.zip) and unpack it on the xp machine it is ok.
But this is quite a longgoing project as packing and unpacking takes quite some time.

Maybe as someone on morphzone suggested it has something to do with the names off the files?