smbmount with big file sizes

[yash at linux-delhi.org]

Dear All,
     I am mounting NTFS file system from few of my windows NT m/cs to Linux backup server.
  Few files among them are very big in size around 5 GB. My problem is, when i does 'ls -l /ntfs-share'
  then 
  it shows weird size of that file i.e

  [root at backup yash]# ls /mnt-sybase/ -l
  total 6609656
  -rwxr-xr-x    1 root     root     521011200 Jun 18 09:18 DataApplication20020617_2346.dat
  -rwxr-xr-x    1 root     root     210982912 Jun 25 09:19 DataApplication20020624_2347.dat
  -rwxr-xr-x    1 root     root     18446744072370819072 Jun 18 09:28 DataCCPRO20020617_2348.dat
  -rwxr-xr-x    1 root     root     18446744072455077888 Jun 25 09:28 DataCCPRO20020624_2348.dat
  -rwxr-xr-x    1 root     root       272384 Jun 25 09:32 LogApplication20020625_0002.dat
  -rwxr-xr-x    1 root     root        22528 Jun 25 09:46 LogApplication20020625_0016.dat
  -rwxr-xr-x    1 root     root        26624 Jun 25 10:01 LogApplication20020625_0031.dat

  
As shown in third and fourth row of files.
Is there any limitation to 'smbmount' that it does't recognises after a definite
  size of a file ?

I have also tried:
 
http://www.hojdpunkten.ac.se/054/samba/index.html

with exactly the steps whatever they are:  
But no luck i have used kernel 2.4.16 and samba 2.2.2.
Can anyone help!

  Regards
  -Yash