Kind of vague here. But, is the message from someone NOT in you contact list? If so that could be the issue. I have seen that and Amarullz fixed it but his fix brought other issues so I reverted back to a prior version.
Firstly ensure that you are on the latest release of SKIROM. Build 122309. This is important. Also, please when you post issues, which I want everyone to do, list the ROM and build number. Without this info all answers are just guesses.
Seems like monikers/abbreviations go well on PPCGeeks so I will create one:
List your MMS: make, model and serial number
1. What carrier are you on? The default carrier MMS setting on this ROM is Sprint, although most of them are already there. You just have to select the correct default.
2. That is usually indicative of a mod having been applied which is not compatible. I have posted here before that you should take caution with the mods on top of MaxDusk. Very iffy. If you want to apply your own mod I suggest the M2.5 Standard version.
3. Landscape ONLY works on three tabs as has been mentioned here before. Messaging
Photo
Music
All three by using the gsensor and just rotating your phone.
The exception is landscape HTC Classic messaging. to get this, open a text message like you are going to start a new one or replying to one. Then just open the keyboard.
Cheers everyone and Happy holidays!