It now appears from sub-section 10 of section 14 - Contributions to UN Peace Keeping Operations - of the Wikipedia, Bangladesh has been contributing civilian police to UNMISET/UNMIT since 1999 to till date. The information is not fully correct because Bangladesh had sent civilian police to the United Nations Transitional Administration in East Timor (UNTAET) in 1999. UNTAET was responsible for administering East Timor during the transitional period to independence. It administered East Timor from 1999 to May 2002. In May 2002, on completion of its mission in East Timor, UNTAET was replaced by UNMISET with a different mandate for post independent East Timor.
Late Sergio Viera de Mello was inter alia Transitional Administrator of East Timor during UNTAET. It may be mentioned here that Bangladesh had sent women civilian police to a UN mission in 1999 for the first time in its history - the mission was UNTAET. The then-SP Mili Biswas was leading the first Bangladeshi police contingent at UNTAET. The then-Col. Ismail was heading Engineers' Battalion of Bangladesh Army at UNTAET. Mrs. Sarwar Sultana was inter alia Acting Cabinet Member (Internal Administration) of East Timor at UNTAET.
In light of above, it is expected inter alia Wikipedia and concerned others will correct the information at the soonest and re-engineer the present information as deemed appropriate.