android - platform incompatible and package incompatible error when installing application on phone

i have made an android application for "Project Build Target" as

Targ开发者_StackOverflow社区et name:: "Android 2.2"

Vendor :: "Android Open Source Project"

Platform :: "2.2"

API Level :: "8"

I am using Eclipse helios and android sdk r_06.

But the phone where i am want to run my application has platform 1.6

how do make this application run on that phone with that platform because when i installed the application it gave me error "incompatible platform","package corrupted","package not found"

how do i make it compatible??

also in eclipse when i changed target name as "Android 1.5" it gave me error in res folder tellin "invalid resources directory"

You need to install an older version of the SDK there are instructions here. Make sure you get one for 1.6 or less. You may or may not need to change your code to make it run on the earlier version.