how can i Root samsong sprint intercept 2.2.3

[yoopti]

after a factory refurbish, my phone came back with 2.2.3 sprint. it used to be VM 2.2.2. it was very easy to root it, now it is impossible.
i have tried super one click, and some root android apk that i used it on 2.2.2 and it did worked fine, but nothing can root this little phone anymore . any one has any idea?
thank you