$11-$ operand types do not match

$.$MODEL SMALL

$.$STACK $100$H

$.$DATA

MSG DB $80,?,80$ DUP$(0)$

$.$CODE

MOV AX$,$@DATA

MOV DS$,$AX

MOV AH$,0$AH

LEA DX$,$MSG

INT $21$H

MOV CX$,$MSG$+1$

LEA SI$,$MSG$+2$

MOV AH$,02$H

MOV DL$,\text{'}*\text{'}$

CMP BYTE PTR $[$SI$],\text{'}$A$\text{'}$

JE REPLACE

CMP BYTE PTR $[$SI$],\text{'}$E$\text{'}$

JE REPLACE

CMP BYTE PTR $[$SI$],\text{'}$I$\text{'}$

JE REPLACE

CMP BYTE PTR $[$SI$],\text{'}$O$\text{'}$

JE REPLACE

CMP BYTE PTR $[$SI$],\text{'}$U$\text{'}$

JE REPLACE

CMP BYTE PTR $[$SI$],\text{'}$a$\text{'}$

JE REPLACE

CMP BYTE PTR $[$SI$],\text{'}$e$\text{'}$

JE REPLACE

CMP BYTE PTR $[$SI$],\text{'}$i$\text{'}$

JE REPLACE

CMP BYTE PTR $[$SI$],\text{'}$o$\text{'}$

JE REPLACE

CMP BYTE PTR $[$SI$],\text{'}$u$\text{'}$

JE REPLACE

JMP NEXT

REPLACE: MOV BYTE PTR $[$SI$],$DL

NEXT: INC SI

LOOP NEXT

MOV AH$,4$CH

INT $21$H

END