Her dad doesn't like me I don't know why

My girlfriend's dad really hate me for reasons that I don't know. Whenever I visited her, he would always scowl at me. I have tried impressing him but he won't really budge. I bought his favourite drink, gave him stuff, and had a sincere talk with him about my girlfriend. I thought those would be enough but I was wrong. Is this really how it's like in latin women dating? Are Latino fathers really strict on their daughter's lovers? I don't know what else I could do. Please help me.