Code was forgotten and need to reset somehow. is there any way to do it by myself?

You will find a link to download the manual for your model on this page:

http://www.kaba-ilco.com/access_control/literature/literature_grid_mechanical_pushbutton_locks.aspx?id=13

These are PDF files, requiring Adobe Reader to open. There is a link on the same page to download Adobe reader.

Go to the right-most column on the manual grid page, labelled "TIPS", and there you will find the files with the programming instructions.

As you will see, there is a reference in those instructions for the need for a DF-59 key. A Df-59 key can be purchased at this site:

http://absupply.net/kaba-access-control-lock-1000-series-key-df59.aspx

Also, there is a need for a spanner wrench. The spanner wrench (SMPBC201278 Simplex:SpannerWrench $9.00) referred to can be purchased from this site:

http://www.ckilock.com/Mpage18.asp

Kaba-Ilco Customer service can be contacted from this link:

http://www.kaba-ilco.com/access_control/support_contacts/service_and_support.aspx

Tech Support from this link:

http://www.kaba-ilco.com/access_control/support_contacts/technical_support.aspx

Good luck!