[Unable to Log into Mesh viewer]

hey peeps

ive been looking forward to test mesh beta viewer, but i have one big problem

i cant even log in on startup, as soon as i log it waits a few seconds then the terms and conditions box comes up but i am unable to tick the checkbox as its greyed out.

as requested by Rhett here is the build details

Second Life 2.6.0 (218701) Jan 11 2011 08:43:57 (Project Viewer - Mesh)
Release Notes

CPU: AMD Athlon(tm) II X4 630 Processor (2800.08 MHz)
Memory: 3840 MB
OS Version: Microsoft Windows 7 64-bit  (Build 7600)
Graphics Card Vendor: NVIDIA Corporation
Graphics Card: GeForce 9200/PCI/SSE2

Windows Graphics Driver Version: 8.17.0012.6099
OpenGL Version: 3.3.0

libcurl Version: libcurl/7.21.1 OpenSSL/0.9.8j zlib/1.2.3 c-ares/1.7.1
J2C Decoder Version: KDU v6.4.1
Audio Driver Version: FMOD version 3.750000
Qt Webkit Version: 4.7.1 (version number hard-coded)
Voice Server Version: Not Connected
Built with MSVC version 1400