break point problem

hi,

  in my webservice, there r 2 mothods. i put breakpoint to both the methods and this webservice is calling in aspx page.

   here my problem is when control comes to the 1st method breakpoint and execution of first line, the control goes to the 2nd method and executes 1st line,again it comes to the 1st method,, and executes next line and goes to 2nd method 2nd line. why  the controls jumps between the methods.

i checkd in breakpoint position it showing "the process or thered changed  since last step".

plz let me know  how to solve this problem

thank u