Ok the problem is that HTC and a lot of the phone makers out there automatically disable the option and in HTC's case completely leave out the registry entry so.....
Navigate to HERE:
Step 1
HKEY_CURRENT_USER\Software\Microsoft\SMS\TextShare d
you will find something in there that says:
ab (default)
(value not set)
if its there then ignore it and if its not there then dont worry about it.
Step 2
add a
DWORD Value of this below
EMSHandlerInstalled
DWORD Data is 1
and Base is DEC on the radial button.
SOFT REBOOT AND ENJOY PEEPS