coinbase FIX api - fix-protocol

I am trying to implement Coinbase's FIX api. I have managed to successful send the Logon Message (A) but I can't mange to successfully send the place order message (D). When I try to place an order I get back an error "CompID problem". I send fix field 49={my api key} and the fix field 56=Coinbase.

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If smbd encountered the same and can share tips on how to solve it, I'll be really greatful!
The request content
The response

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Thank you.
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MY Request looks like this:
Request
Thanks alot!