webservice错误

我客户端调用webservice时
方法只需要一个参数，
我发送空字符串或者该xml一部分
<ESPT>
  <MAIN>
  <AGREEMENT>
  <LOANS>
  <LOANBANK> </LOANBANK>
  <LOAN_LIST/>
  </LOANS>
  <PRODUCTS>
  <AMONTTOTAL> </AMONTTOTAL>
  <PRDCOUNT>1</PRDCOUNT>
  <PREMTOTAL>10.00</PREMTOTAL>
  <PRODUCT_LIST>
 不会报错
如果全部发送
<ESPT>
  <MAIN>
  <AGREEMENT>
  <LOANS>
  <LOANBANK> </LOANBANK>
  <LOAN_LIST/>
  </LOANS>
  <PRODUCTS>
  <AMONTTOTAL> </AMONTTOTAL>
  <PRDCOUNT>1</PRDCOUNT>
  <PREMTOTAL>10.00</PREMTOTAL>
  <PRODUCT_LIST>
  <PRODUCT>
  <AMOUNT> </AMOUNT>
  <CURRENCY>CNY</CURRENCY>
  <EVENTNO> </EVENTNO>
  <EVENTTIME>2011-12-20 10:01:01</EVENTTIME>
  <ISDID>1</ISDID>
  <ISRPERIOD> </ISRPERIOD>
  <ISRUNIT>D</ISRUNIT>
  <MRTYPE>1</MRTYPE>
  <PAYPERIOD> </PAYPERIOD>
  <PAYTYPE>2011-12-20 10:01:01</PAYTYPE>
  <PRDCODE>1118939800000001</PRDCODE>
  <PREMIUM>10</PREMIUM>
  <VALIDDATE>2011-12-20</VALIDDATE>
  <VALIDTIME>10:01:0</VALIDTIME>
  </PRODUCT>
  </PRODUCT_LIST>
  </PRODUCTS>
  </AGREEMENT>
  <APPLICANT>
  <APPADDR> </APPADDR>
  <APPBIRTH> </APPBIRTH>
  <APPEMAIL> </APPEMAIL>
  <APPGENDER> </APPGENDER>
  <APPIDNO> </APPIDNO>
  <APPIDTYPE> </APPIDTYPE>
  <APPMOBILE> </APPMOBILE>
  <APPNAME>周权</APPNAME>
  <APPPOST> </APPPOST>
  <APPPROFCODE> </APPPROFCODE>
  <APPPROFTYPE> </APPPROFTYPE>
  <APPTEL>10000000</APPTEL>
  </APPLICANT>
  <BENEFICIARYS>
  <BENEFICIARY_LIST>
  <BENEFICIARY>
  <BNFADDR> </BNFADDR>
  <BNFBIRTH> </BNFBIRTH>
  <BNFEMAIL> </BNFEMAIL>
  <BNFGENDER>M</BNFGENDER>
  <BNFID>1</BNFID>
  <BNFIDNO>44444444444444</BNFIDNO>
  <BNFIDTYPE> </BNFIDTYPE>
  <BNFISDRLT>M</BNFISDRLT>
  <BNFMOBILE> </BNFMOBILE>
  <BNFNAME>宁波分公司</BNFNAME>
  <BNFORDER> </BNFORDER>
  <BNFPOST> </BNFPOST>
  <BNFSHARE>100</BNFSHARE>
  <BNFTEL>8888888</BNFTEL>
  <ISDID> </ISDID>
  <PRDCODE> </PRDCODE>
  </BENEFICIARY>
  </BENEFICIARY_LIST>
  <BNFCOUNT>1</BNFCOUNT>
  </BENEFICIARYS>
  <INSUREDS>
  <INSURED_LIST>
  <INSURED>
  <APPRLT>M</APPRLT>
  <ISDADDR> </ISDADDR>
  <ISDBIRTH> </ISDBIRTH>
  <ISDEMAIL> </ISDEMAIL>
  <ISDGENDER>M</ISDGENDER>
  <ISDHEALTHNOTICE> </ISDHEALTHNOTICE>
  <ISDID>1</ISDID>
  <ISDIDNO>44444444444444</ISDIDNO>
  <ISDIDTYPE> </ISDIDTYPE>
  <ISDMID> </ISDMID>
  <ISDMOBILE> </ISDMOBILE>
  <ISDNAME>宁波分公司</ISDNAME>
  <ISDPOST> </ISDPOST>
  <ISDPROFCODE> </ISDPROFCODE>
  <ISDPROFTYPE> </ISDPROFTYPE>
  <ISDTEL>8888888</ISDTEL>
  <ISDTYPE> </ISDTYPE>
  </INSURED>
  </INSURED_LIST>
  <ISDCOUNT>1</ISDCOUNT>
  </INSUREDS>
  <MANAGE>
  <AGENTNO>21033302610001</AGENTNO>
  <APPDATE>2011-12-20 10:01:02</APPDATE>
  <APPNO>1</APPNO>
  <APPTYPE>1</APPTYPE>
  </MANAGE>
  </MAIN>
  <SYSTEM>
  <ROUTE>
  <PROVNO>330000</PROVNO>
  </ROUTE>
  <SECURITY>
  <DIGISIGN> </DIGISIGN>
  </SECURITY>
  <TRANCHANNEL>21033302610001</TRANCHANNEL>
  <TRANCODE>2001</TRANCODE>
  <TRANNO>1324612390428</TRANNO>
  <TRANTIME>2011-12-23 11:53:10</TRANTIME>
  </SYSTEM>
  </ESPT>
就会报错，意思就是，参数太长就会报错，这个问题怎么解决
 

这个长度没问题，应该是中文引起的