R/3 Datasource

Hi,

I have a SAP data source 0EC_PCA_1, in that datasource there is an extract structure ISPCACST, Already there are some fields available in this extract structure. Now i have inserted a new field ACTIV to the standard extract structre ISPCACST.

Remember, I didn't use append structure, Just inserted a standard SAP field ACTIV using access key.

Question is, I am not able to see the inserted field(extract structure) in the datasource 0EC_PCA_1.

I have generated the datasource, still i am able to see the earlier fields and not the newly inserted field ACTIV in the datsource.

Can anyone please let me know how do bring the SAP standard inserted field from extract structure to datasource 0EC_PCA_1.

Thanks in advance.