Hi!You can change the admin password only via U2000.Please see the steps:
Step 1. Download the old VAS profile and find the UserInterface nodes:
<UserInterface>
<X_HW_WebUserInfo NumberOfInstances="1">
<X_HW_WebUserInfoInstance Enable="1" InstanceID="2" Password="UD3F450BF1420B1D1EC4FC28B83634BB" UserLevel="0" UserName="e6588EED7B47E466BE215DD0D1239256"/>
</X_HW_WebUserInfo>
</UserInterface>
Step2. Change the Password and the UserName to what you want. For example telecomadmin/telecomadminpasswd.
<UserInterface>
<X_HW_WebUserInfo NumberOfInstances="1">
<X_HW_WebUserInfoInstance Enable="1" InstanceID="2" Password="telecomadminpasswd" UserLevel="0" UserName="telecomadmin"/>
</X_HW_WebUserInfo>
</UserInterface>
Step3. Upload the new VAS profile and bind again.
Thanks