FIRST THING!!!!!!!!
this forum is NOT !!!! a 140 limited text message
please DO NOT !!! use "text speek"
"YOU" is NOT !!! spelled as "u"
5.5 is 6 minor versions out of date
and about 3 years out of date
contact redhat sales
the current version in the OLD legacy hardware/software support is 5.11
https://www.redhat.com/wapps/store/catalog.html
if you NEED to LOCK it at 5.5
that will cost EXTRA