Error with dialup admin

[bishal at baayu.com.np]

Hello all

     I have installed freeradius 1.1.0 in freebsd 6.0. While clicking on
statistic menu of dialup page I got this error.

Warning: mktime() expects parameter 1 to be long, string given in
/usr/home/httpd/baayu.com.np/baayucom/dialbaayu/lib/functions.php3 on
line 83

Warning: mktime() expects parameter 1 to be long, string given in
/usr/home/httpd/baayu.com.np/baayucom/dialbaayu/lib/functions.php3 on
line 83