Since + tense

[s9companion]

Hi

Could anyone tell me which are grammaticaly correct?

Since I have known her, I have had a lot of problems
Since I knew her, I have had a lot of problem
Since I got to know her I have had a lot of problem

Thanks a lot in advance

[Raymott]

1 and 3 are OK. 2 isn't right. You could say "Since I met her, I've had ...".
Meeting someone refers to a specific time. Knowing someone doesn't.