Rovers are eight points adrift at the foot of the table following a 5-2 defeat to Ayr United on Saturday.
They play Stenhousemuir tonight looking to kick-start their survival bid.
Boss Lumsden said: "All I am thinking about is getting the next win.
"I honestly believe with the squad we have we are good enough to stay up.
"There is not a lot between the teams but, more often than not, we have been on the wrong end of a draw or a defeat in games we should have won and that is what is costing us."
Also in the Third Division tonight, Clyde make the trip to East Stirling looking to bounce back from their 4-1 weekend defeat at home against league leaders Rangers.
Kevin Watt netted a consolation goal for the Bully Wee and boss Jim Duffy is keen to take the positives from the game.
He said: "From our point of view, it was about showing a bit of character in the second half and we managed to do that.
"We scored a terrific goal and we had a few crosses and efforts at goal in the second half, whereas we had nothing in the first half."