Question SendKeys.Send("{enter}") not working?

[dwarf2000]

Hello, I'm into playing Halo, and I'm also hosting an dedicated server. Now i've made an program to send a message to the server, using AppActivate and SendKeys. The problem is that it activates correctly, it sends the text entered in the textbox, but after that it should execute

SendKeys.Send("{enter}")

But it won't. It doesn't give an error, it just continues, but it doesn't do the {enter} stuff. I hope someone can help me with an alternative or an other solution. Thanks.

Ps. I don't know if this is the right section, but this is my first post.