My 2007 5040 was running fine I pulled in the drive let sit for 30 minutes returning to tractor went into reverse no problem then when I attempted to shift into forward it would not go into forward or reverse. I found that with the gear shift in neutral I could shift the forward and reverse lever with no problem but with the lever in forward or reverse I could not shift the gear shift lever or with the gear lever in gear I cannot shift the forward or reverse lever all of this with the engine running but I turn off the engine everything shifts correctly. Can someone help out please?