UART PROBLEM!!!

I have a question about UART! I am working with S3C2410X, and I have two UVISION IDE,one is eval,another is BETA4.my project is a UART,in eval mode,my uart project is good,which can output correctly,but the same projcet on beta4 ,is wrong!!!which can't output.

so I watch their differences in disassembly,I find a difference as follow:
(1)EVAL MODE

   177:     vsprintf(pString,fmt,ap);
0x3000066C  E59D1020  LDR       R1,[R13,#0x0020]
0x30000670  E59D2018  LDR       R2,[R13,#0x0018]
0x30000674  E28D0004  ADD       R0,R13,#0x00000004
0x30000678  EB000017  BL        0x300006DC
   178:     uart_sendstring(pString);
   179:     va_end(ap);

(2)BETA4 MODE

   176:     vsprintf(pString,fmt,ap);
0x30000578  E59D1020  LDR       R1,[R13,#0x0020]
0x3000057C  E59D2018  LDR       R2,[R13,#0x0018]
0x30000580  E28D0004  ADD       R0,R13,#0x00000004
0x30000584  FA000017  (???)
   177:     uart_sendstring(pString);

the difference is maked with BOLD

In EVAL MODE,

the R/O base:0x30000000 , R/W base:0x30900000

and in BETA4 MODE:the scatter files is as follow:

LR_ROM1 0x30000000         {    ; load region
  ER_ROM1 0x30000000 0x00200000  {  ; load address = execution address
   *.o (RESET, +First)
   *(InRoot$$Sections)
   .ANY (+RO)
  }
  RW_RAM1 0x30900000 0x04000000  {  ; RW data
   .ANY (+RW +ZI)
  }
}

I want to know this is why and how to modify my project? thand you!