ANTLRException unexpected char: '@'

Getting Following Exception while testing a selct query in Hibernate.

DEBUG - opened session at timestamp: 13411683004
DEBUG - unable to locate HQL query plan in cache; generating (from TestContents where contentId =@pContentId and contentType =@pContentType)
DEBUG - parse() - HQL: from TestContents where contentId =@ pContentId and pContentType =@ pContentType
DEBUG - converted antlr.ANTLRException
line 1:36: unexpected char: '@'
at org.hibernate.hql.antlr.HqlBaseLexer.nextToken(HqlBaseLexer.java:278)
at antlr.TokenBuffer.fill(TokenBuffer.java:69)
at antlr.TokenBuffer.LA(TokenBuffer.java:80)
at antlr.LLkParser.LA(LLkParser.java:52)
at org.hibernate.hql.antlr.HqlBaseParser.primaryExpression(HqlBaseParser.java:874)
at org.hibernate.hql.antlr.HqlBaseParser.atom(HqlBaseParser.java:3438)
at org.hibernate.hql.antlr.HqlBaseParser.unaryExpression(HqlBaseParser.java:3216)
at org.hibernate.hql.antlr.HqlBaseParser.multiplyExpression(HqlBaseParser.java:3098)
at org.hibernate.hql.antlr.HqlBaseParser.additiveExpression(HqlBaseParser.java:2818)
at org.hibernate.hql.antlr.HqlBaseParser.concatenation(HqlBaseParser.java:570)
at org.hibernate.hql.antlr.HqlBaseParser.relationalExpression(HqlBaseParser.java:2586)
at org.hibernate.hql.antlr.HqlBaseParser.equalityExpression(HqlBaseParser.java:2449)
at org.hibernate.hql.antlr.HqlBaseParser.negatedExpression(HqlBaseParser.java:2413)
at org.hibernate.hql.antlr.HqlBaseParser.logicalAndExpression(HqlBaseParser.java:2331)
at org.hibernate.hql.antlr.HqlBaseParser.logicalOrExpression(HqlBaseParser.java:2296)
at org.hibernate.hql.antlr.HqlBaseParser.expression(HqlBaseParser.java:2082)
at org.hibernate.hql.antlr.HqlBaseParser.logicalExpression(HqlBaseParser.java:1858)
at org.hibernate.hql.antlr.HqlBaseParser.whereClause(HqlBaseParser.java:454)
at org.hibernate.hql.antlr.HqlBaseParser.queryRule(HqlBaseParser.java:708)