> i am founding some errors
Some secret errors?
If the errrors are not secret, then pls. tell WHICH ones!

I just modified little bit and again a error like,
# ** Error: 
D:/Anjali/Data_Simulator/27th_June/Serial_Convertertb/Serial_Convertertb 
.vhd(31):  near "USE": expecting '[' or '(' or '.' or '''
so where and how to modify this and iam attachin the file which is 
modified too.

ya but even when modifying its not clearing that is what i need how to 
rectify it

> I think there is a ';' missing at the end of this line:
And the most simple solution will be to delete that line, because in the 
previous line .ALL is included...

1

USE ieee.std_logic_1164.ALL;

2

USE ieee.std_logic_1164.std_logic_vector

if i delete that line getting 3 errors like
# ** Error: 
D:/Anjali/Data_Simulator/27th_June/Serial_Convertertb/Serial_Convertertb 
.vhd(91):  No feasible entries for infix operator "+".

# ** Error: 
D:/Anjali/Data_Simulator/27th_June/Serial_Convertertb/Serial_Convertertb 
.vhd(91):  Type error resolving infix expression "+" as type 
ieee.std_logic_1164.std_logic_vector.

# ** Error: 
D:/Anjali/Data_Simulator/27th_June/Serial_Convertertb/Serial_Convertertb 
.vhd(96):  near "=": syntax error

then what to do

> No feasible entries for infix operator "+".
Take any vhdl book and read the first few pages....

However: this simple message means that the simulator does not know, how 
to add a integer to a std_logic_vector. Tell it to him by adding the 
old fashioned and obsolete IEEE.std_logic_unsigned.all. In that package 
the desired unsigend addition is defined...

What about looking, how others are doing such things?
Google is a very recommended place for such error messages:
http://www.google.com/search?q=No+feasible+entries+for+infix+operator


BTW:

1

USE IEEE.std_logic_arith.all;

2

3

USE ieee.numeric_std.ALL;

Use these old obsolete Libs:
 IEEE.std_logic_arith.all;
 IEEE.std_logic_unsigned.all;

Or this new and fresh one:
 ieee.numeric_std.ALL;

But NEVER EVER all of them TOGETHER!

that is cleared but 1 error is coming but which is a syntax error even i 
did many changes its not resolving
 # ** Error: 
D:/Anjali/Data_Simulator/27th_June/Serial_Convertertb/Serial_Convertertb 
.vhd(96):  near "=": syntax error

i resolved it , thank u soo much for your posts i resolved the errors 
now it got simulated thanks alot