Sort Query Results By Calendar Month

I'm trying to sort my query results by the month value "Data (IMPORT).KP_MM_DS" but I get alphabetical results.

SELECT [Data (IMPORT)].KP_YR_NB, [Data (IMPORT)].KP_MM_DS, Round((Count([Data (IMPORT)].KP_ISSU_ID_NB)/20)) AS CountOfKP_ISSU_ID_NB, [Data (IMPORT)].KP_MM_DS
FROM ([Data (IMPORT)] LEFT JOIN [Facility Lookup] ON [Data (IMPORT)].KP_FAC_NM = [Facility Lookup].[FAC NAME]) LEFT JOIN DEPTLOOKUP ON [Data (IMPORT)].KP_DEPT_ORG_NM = DEPTLOOKUP.[EPM DEPARTMENT NAME]
WHERE ((([Facility Lookup].[REPORTING MCA])<>"XXX") AND (([Data (IMPORT)].KP_SB_RGN_CD)="N"))
GROUP BY [Data (IMPORT)].KP_YR_NB, [Data (IMPORT)].KP_MM_DS, [Data (IMPORT)].KP_MM_DS;