We Use Mikrotik UserManager 3.7 with PPP.
but we get problem in data limit ......... on next recharge.

i give example , we give one plan to User on Data Limit l1.5 gb per month ok
first recharge its working properly but when next recharge we add 30 days but in transfer limit its same 1.5 gb and if its usage 1 gb then after its complete 1.5 gb its expire so its count total limit only.but in ISP case its count agin 1.5 gb on next renewal.

and what we want when user renew by ISP its data limit and credit limit count again.
like if i renew one client on 1 may 2008 to 30 may 2008 then its credit limit we add 30 day but also we want one option like add separate data limit like 1.5 gb then in this month client use 1.5gb and after this month client renew account then ISP only add credit limit and Data Limit but in mikrotik User Manager its not possible bcz data limit (transfer limit) is static.

right now we solve this problem but in this when user show his usage it get total transfer limit .
i give example our one client usage 2.3 gb and after he renew 1.5 gb plan then what we do , we add transfer limit 2.3+1.5 gb total its 3.8 gb in total transfer limit.but in this way we solve this problem but when user check its usage it cant get actual data usage in month bcz its display whole data.

so if some change by mikrotik like we make credit and add in user like that we also add data limit to user and its display separate.

Asked options are not possible for PPP, you can use it only together with HotSpot,
http://www.mikrotik.com/testdocs/ros/3. ... otspot.php