Flash ToolTip Problem - i don't understand it o_o

programming
1 
**Error** Scene=Scene 1, layer=button, frame=1:Line 1: Mouse events are permitted only for button instances
     on (rollOver) {

**Error** Scene=Scene 1, layer=button, frame=1:Line 4: Mouse events are permitted only for button instances
     on (rollOut, dragOut) {

Total ActionScript Errors: 2      Reported Errors: 2

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What does it try to tell me? I have included the .fla source file
Please check for me. What is the solution to fix this problem?**