Yes, There is a bug in Keil software simulation of LPC1100.
No, it isn't - that's the link for this thread!
"Why that thread has no reply button?"
Does it say that it is Read-Only...?
If so, that's because it's been idle for so long that it's highly unlikely that anyone is still listening!
But there is a long-standing bug in the forum on this: http://www.keil.com/forum/20338/