yes simply because your pictures are to large for you to upload, here are some instructions on how to upload pics using a popular website known as photobucket.
OK HERE WE GO STEP ONE
Put the photos you want to post in a new folder (just make them easier to find)on your computer STEP TWO
Go to a photo hosting site like photo bucket and open an account (its piss easy so far here's a link) Register for free at Photobucket.com STEP THREE
Create an album and upload a photo from the new folder you made on your computer just use the browse button. (pics can be large size mine were over 1mb) STEP FOUR
Once you have uploaded the photos you want to post select one then scroll down, on the right there's a button that says GENERATE HTML AND IMG CODE
click it STEP FIVE
Scroll down to the 4th option and copy the all the text (click your cursor at the end of the text then hold left click down and drag back to the start to highlight then right click and select "copy") STEP SIX
Now back in the message box on miniriders up the top in the tools click on the insert link button its just below the smily face and in the text box that appears leave it highlighted and just right click in there and select paste. the IMG CODE that you copied from photobucket should appear.
then cliclk ok and that same IMG CODE should appear in the message box all you do then is submit it and your done.