Specific two albums don't play [Sansa Clip Zip]

[SandSpider2234]

[Context]
Sansa Clip Zip 8GB
Rockbox firmware 3.13

Hey,
For some reason when I try to play two of my favorite albums Rockbox just skips all of the songs. Only these albums skip ahead. I tried re-copying them, but still no luck. The files are .wma. In addition, the songs don't appear in the database.

Does anybody else has this problem? And is there a solution?

[saratoga]

Are they encrypted?

[SandSpider2234]

I don't think so...
Forgot to say, the files work fine on the computer, and I tried to use to original firmware to see if the problem is with the songs or with Rockbox, but still no luck.

[saratoga]

Well when you find out, be sure to post here.

Also, check what type of WMA file they are.  If they don't work in the Sandisk firmware, they may be some odd format. 

[SandSpider2234]

How do I check if they are encrypted?
They are regular .wma files, nothing special.

[saratoga]

How do I check if they are encrypted?
They are regular .wma files, nothing special.

I think Windows Media Player can tell you if they're encrypted.  You said they're .wma before, but I'm asking what kind.  Check that too.