reverse lookup record?

[MrPlow]

In trying to determine why email from my domain is being blocked by AOL 
I came to this page
http://postmaster.aol.com/info/rdns.html

I'm looking specifically at this bit:
"Reverse DNS must be in the form of a fully-qualified domain name – 
reverse DNSes containing in-addr.arpa are not acceptable, as these are 
merely placeholders for a valid PTR record."

My PTR record looks like this:

137     IN      PTR     dataentropy.com.

and it's in the file for zone "238.55.69.IN-ADDR.ARPA"
so, wouldn't that mean that the record actually reads:

137.238.55.69.IN-ADDR.ARPA.	IN	PTR	dataentropy.com.


Is there anything wrong with that?