Can't burn a CDR

Hi,
I have a dell inspiron 1521 and I am having trouble burning a cdr using windows media player 11. I have no problems burning cd-rw but the cdrw once burned does not work on all cd players. Can you give me any help as to how to burn a cd-r or why this is not happening on my computer. I have tried changing the burn speeds but still no success. My operating system is windows vista home premium.
 
This is usually an issue of alignment errors between different player/ burners
.
I'm assuming that you've burned your CDs in a format that's compatible with the other players you're trying to use them on.
 
well I assume I am.

Hi again,
I burnt a cdrw and it worked well on both of my car stereos(one of which is just a normal stereo no mp 3) it also worked well on one of my portable cd players.
When i burn cdr the entire process goes well but after the disc pops out it does not work on anything including the laptop I burnt it on, whic in fact does not even recognise it as having anything in it. This is veryconfusing please tell me you can help.
 
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