I collected my Trialmaster from Grange in Edinburgh this week and haven't stopped playing since, I just love it! However, today whilst familiarizing I found a problem which someone out there my be able to help with. I cannot get the transfer box lever to move from its "high" position to "low" position. I have followed the guidelines in the manual - engine running, main lever in "N" position, foot on the break, lift the transfer box collar and it will not move from the "high" position. Am I missing something? Any ideas?