experts!!! Skype android 2.2.1 problems!! help

i had phone name (BEE 7100) 2.2.1 OS. But when i installed Skype for Android, it said "application (skype) is in compatible with the system? even my phone have 2 camera ???

 

well the phone have rear facing camera ?? i think problem is the Os 2.2.1 not allow for cheeps phones can make video call ?
need to be cracked or updated to 2.3 but i don't know how to update it ,,
i did download Yahoo! Messenger ,, then ask me to download plug in for enable video and voice call , i click in get the plug ,, android market not allow it ,,
so i used another website to download the plug ,,( Yahoo-Messenger-Plug-in-1.5.apk )then i did download it and i allow unknown sources.. so its works now but skype not working