Some bugs that i found in Metalink assembler:

command Have to write
---------- -----------------------
push a push acc
pop a pop acc
mov a,#a0h data have to binary or in decimal(10100000b)specially if data bigger than a0h.You have to more becarefull if you use data bigger than A0h.

please check again after you compile the ASM file from metalink assembler by open the LST (List File)

Have fun