Problem On Store Report Parameter in Subscription ( by custom UI)

I wrote a interface on my website about create/update subscription .
when I get the parameter back by using GetReportParameters ()
the value was swap
for example:
I have 8 reportparameter: tcust, fcust, fdnnum, tdnnum, fdept, tdept, fairline, tairline.
all of them are string
when I create the subscription by:
tcust 1
fcust 2
fdnnum 3
tdnnum 4
fdept 5
tdept 6
fairline 7
tairline 8

then I get back that subscription
the value will be :
tcust 2

fcust 3

fdnnum 8

tdnnum 5

fdept 1

tdept 7

fairline 4

tairline 6

are there any order for storing the ReportParameter[] ?
thank youYou should not rely on order. ReportParameter has property Name which can be used to identify the parameter. See sample code at http://msdn2.microsoft.com/en-gb/library/microsoft.wssux.reportingserviceswebservice.rsmanagementservice2005.reportingservice2005.getreportparameters.aspx