Thx for the response.   Unfortunaly, I read the 300 series support notice after I upgraded to 5.3.4. (Doh).  I confirmed I do have the 300 series (blue indicator light on the rear of the chassis).   I will verify previous load tonight.   Is the 500 series board upgrade still available, and is that a suggested path until I get to EISY?  Or are you suggesting downgrade path may be the better option?
 
	Appreciate the response.