How to implement recommedation

From the Feed Validator, which indicates if I've exceeded the max number of=
 characters in my ITunes feed, I recieved the following:=20

Recommendations
This feed is valid, but interoperability with the widest range of feed read=
ers could be improved by implementing the following recommendations.

=95line 3, column 0: Use of unknown namespace: http://www.adobe.com/amp/1.0=
 [help]

<rss version=3D"2.0"

Currently line 3 reads: <rss version=3D"2.0".  I have no access to the code=
 to  make the change.  Any suggestions?
Thanks,
provbs1130=20



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