How to assign variables to solve()-function CAS Fox-CP400

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Hello,

My code is like that:

10=>q
500=>l

Solve({A+B-q*l=0,q*0.5*l^2-B*2*l=0},{A,B}}=>{K,L}

Print K
Print L

I want to store the values of the solved equation in K and L but get No Solution as result. But when i write

Print Solve({A+B-ql=0,q*0.5*l^2-B*2*l=0},{A,B})

It displayes the right solutions by execution. How can you assign the solved values to variables? Thank you guys (: