Master child relation in crystal report

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C#

CrystalReports

hi all,i have task using Crystal Report and ASP.net
i have problem in crystal report because i still newbie and never use it before.

i make some master report like pivot table with sum per month with store procedure in sql .
so report will generate data like this:

Quote:
Type | January | February | March
===========================
xxxx |1500 | 0 |1500
yyyy |1800 | 1200 |1230
zzzzz |1200 | 0 |1400


i want to clik number 1500 in january and this will call some report detail .
the Report Detail will contain some detail type 'xxxx' in January.
the problem is,i don't know how to make hyperlink in text 1500 and i don't know how to pass parameter to retrieve detail report.

the Detail Report will need 2 parameter:
1.Type= this is ok,because i only select type field.
2. Month= this is i don't know . because in field January,February,March only have Sum per month .


this problem still make me confuse.
anyone can help me?