exception with the type CX_SY_DYN_CALL_PARAM_MISSING

Hi ALl,

I am trying to debug fofllowing function module:SWW_SRV_MAIL_SEND with importing parameters as:

LV_SENDTYPE                                     U

IV_LANGUAGE                                     E

LV_DOCUMENTNAME                                     Note

LV_MAILTITLE                                     Overbooked PO 2110072949 - Office Depot Deutschland GmbH 7563120                  with 5500000253 INCOMING INVOICE 5500000253 2016

LT_MAILTEXT                                     [23x1(510)]Standard Table

IT_ADRESSSTRINGS                                     [1x1(8)]Standard Table

LT_DUMMY_RECEIVERS                                     [0x4(200)]Standard Table

IV_EXPRESS                                  

LV_DEFAULT_DOCUMENT_EXPIRY                                     00000000

LT_DUMMY_ATTACHMENTS                                     [0x4(200)]Standard Table

LV_DUMMY_SIGN                                  

LV_DUMMY_ENCRYPT                                 

As soon as i click on F5, it navigates to

and throws the exception: CX_SY_DYN_CALL_PARAM_MISSING

When this function module executed separately, from se37 it works perfectly-email is sent.

How event through my code(method) this function module is called then it gives exception with above mentioned parameters as importing params.

Can anybody kindly help in resolving this exception?

Thanks,

SD