[singularity viewer issues.]

I using laptop keyboard. Its pretty old laptop. I plan getting new one.

[singularity viewer issues.]

I got problems whenever I am walking around I cannot use my left arrow on my keyboard... It helped me do my left turns when I used left and walk same time. Are there any fixes to this issue? 

[my left key on my keyboard wont turn when I am walking around.. any ways to fix this?]

for some reasons I can not seem to use that left key when i walk and turn same time i used to now cant why ?