[Serusers] radius compile error

hi i m getting the following error while compiling the radius module of ser..what could be the reason? digest.c: In function `radius_authorize': digest.c:70: `PW_SIP_USER_ID' undeclared (first use in this function) digest.c:70: (Each undeclared identifier is reported only once digest.c:70: for each function it appears in.) digest.c:74: `PW_SIP_USER_REALM' undeclared (first use in this function) digest.c:78: `PW_SIP_NONCE' undeclared (first use in this function) digest.c:82: `PW_SIP_NONCE_COUNT' undeclared (first use in this function) digest.c:86: `PW_SIP_USER_DIGEST_URI' undeclared (first use in this function) digest.c:90: `PW_SIP_USER_METHOD' undeclared (first use in this function) digest.c:107: `PW_SIP_USER_RESPONSE' undeclared (first use in this function) digest.c: In function `radius_authorize_freeradius': digest.c:159: `PW_DIGEST_USER_NAME' undeclared (first use in this function) digest.c:163: `PW_DIGEST_REALM' undeclared (first use in this function) digest.c:167: `PW_DIGEST_NONCE' undeclared (first use in this function) digest.c:171: `PW_DIGEST_URI' undeclared (first use in this function) digest.c:175: `PW_DIGEST_METHOD' undeclared (first use in this function) digest.c:183: `PW_DIGEST_QOP' undeclared (first use in this function) digest.c:191: `PW_DIGEST_CNONCE' undeclared (first use in this function) digest.c:200: `PW_DIGEST_NONCE_COUNT' undeclared (first use in this function) digest.c:210: `PW_DIGEST_BODY_DIGEST' undeclared (first use in this function) digest.c:240: `PW_DIGEST_ALGORITHM' undeclared (first use in this function) digest.c:251: `PW_DIGEST_ATTRIBUTES' undeclared (first use in this function) digest.c:257: `PW_DIGEST_RESPONSE' undeclared (first use in this function) make: *** [digest.o] Error 1