Newbie question about nsupdate & TSIG key

[Kareem Mahgoub]

Hi all,
I am using BIND 9.2.1 and i configured it to accept dates for a specific zone.
I used nsupdate on a machine in Netherlands to update the DNS located in Egypt. 
The following error appeared on my log file "TSIG error with server: clocks are unsynchronized".
It is clear that clocks are not synchronized due to TIMEZONE difference.
How can I solve this??
I tried google and the archive of Bind-users and Bind9-users. 
The problem was mentioned several times in the archive but am not sure if they were addressing different timezones.
Sorry if it is a trivial problem.
Any help or guide will be very much appreciated.

Best regards,
Kareem Mahgoub
Senior System Administrator
Wayout
Phone: +2023017153
Fax: +2023017130
45 El Batal Ahmed Abdel Aziz st.
14th Floor, Mohandeseen
Cairo, Egypt