Why Am I Having Problems PMing?! O_O;;

[DM was on fire!]

Okay. Yesterday I was writing a PM to someone, and I got 403. Well, I tried again today, and I'm still getting a 403.
Bear in mind that I've been PMIng another friend just fine.

What's going on here? o_o;;

[Hunter Lupe]

We just don't like you.

Post your message text or something; PMs appear to work fine on my end.

[DM was on fire!]

Yeah, but that's the weird thing. I had two different PMs I was trying to send. One was longer than the other.

I lost it, though. XP