无法在MySql表中插入数据，但我可以很好地检索数据

I can conect to my database just fine, but whenever I try to insert data I get a "Call to a member function bind_param() on a non-object" error, which I know means that I must have mistyped the name of a slot, or something, but I just can't see it, I'm connecting locally, do I have to set up something in MyPhP to allow data to be added from a php file? Thanks in advance.I can conect to my database just fine, but when