Main's winning run was halted by Long Eaton United, a repeat of the scoreline at Long Eaton earlier in the season.
Main survived an early scare when Josh Williams crashed a shot against the outside of the post and, from the rebound, Gary Breach also hit the upright.
After 17 minutes Scott Whittington went close for Main with a fierce shot that United 'keeper Simon Baldwin pushed onto the post.
Four minutes later Main striker Rob Branagan shot wide after Jon Thompson's long throw was only half cleared.
Williams forced Main 'keeper Andy Coulson, recalled in goal in place of the unfit Jamie Bailey, into a good save with a shot from inside the box and Kelvin Mushambi shot wide from the edge of the box as United, finished the half strongly.
United had further chances early in the second half with Williams having a shot blocked by Thompson and a shot saved.

Then Adam Campbell headed wide before, in the 71st minute, Main took the lead when striker Ollie Warren got on the end of Jon Bownes' ball into the box. With his back to  goal the Maltby striker turned neatly and shot past Baldwin into the bottom corner.
Three minutes later Coulson got down well to deny Campbell but, with 3 minutes remaining, United drew level when Campbell's high free kick into the box hit the back of defender Jon Wragg's head  and slipped under  Coulson's  body into the net

Main: Andy Coulson, Jon Thompson (Leigh Warriner 80), Charlie Weir, Jon Wragg, Danny Reilly, Adam Shepherd (captain), Jon Bownes, Greg Mason, Rob Branagan (Danny Jones 88) Ollie Warren, Scott Whittington (Sam Forster 89)
Unused subs: James Radford. Jamie Bailey