Tests pass/fail different servers

[JoeGarcia2]

I am running the tests on 2 different servers, both with identical Apache/PHP versions:
Apache version 2.2.21
PHP version 5.2.17

One is on a shared host and the other is a VPS. The tests run fine on the shared host but fail on the VPS. Here's a few lines of the output:
Key Plain Text Actual Text Result Cipher Text Actual Cipher Result

---

AAAAAAAAAAA= AAAAAAAAAAA= lj58ilBUGbQ= FAIL TvmXRWGY3Xg= q5KFVRNv6gY= FAIL
//////////8= //////////8= CIDSsP/dsqU= FAIL UYZv1bhey4o= IylxgiVYhCA= FAIL
MAAAAAAAAAA= EAAAAAAAAAE= /5jM455QskU= FAIL fYVvmmEwY/I= ulE0GvX7dzg= FAIL

I've tried a few other blowfish classes on the VPS and they have also failed . Is there a setting requirement that I'm missing to allow these scripts to perform correctly?