cost determination in SAP TM

Hi all,

we are using rate tables for cost determination process.

here if we have carrier with different means of transport we have assigned different rates.

but while calculating cost its not considering means of transport .its giving same rate for both .

means of transport is one of the scale item in rate table.

cost determination is the method we are using .

class name :/SCMTMS/CL_PLN_TSPS_IL

method name :COST_DETERMINATION

any idea ?

Thanks.