iPhone 4 Ringtone/text Alert help!?

[xxHannah143]

I just got an iPhone 4 yesterday.
I have a ringtone that I set as my text alert last night and it worked. But earlier today, I connected the phone to iTunes, and when I disconnected, the ringtone stopped working.
I discovered that when I go to set my text tone, it doesn't work because the ringtone is under "ringtones" instead of "alert", but last night and earlier today it was under both.
I was wondering if anyone knows how to make it go back to being listed under both "Ringtones" and "Alerts"?

 

[JamesStephenson]

There is a switch that should be on the upper left on the phone. I have had this happen to me before and this should be the cause. Switch that button and see if it works.