apache httpd pid does not close

Question

I have

httpd -version
Server version: Apache/2.0.52
Server built:   May 24 2006 11:45:10

running on

Linux 2.6.9-42.ELsmp #1 SMP Wed Jul 12 23:27:17 EDT 2006 i686 i686 i386 GNU/Linux

this what is have in httpd config.

<IfModule prefork.c>
StartServers       8
MinSpareServers    5
MaxSpareServers   10
ServerLimit      500
MaxClients       500
MaxRequestsPerChild  400
</IfModule>

KeepAlive Off
MaxKeepAliveRequests 100
KeepAliveTimeout 2

httpd (pid 5274 5273 5272 5271 5270 5269 5268 5267 5266 5265 5264 5263 5262 5261                                                                              5260 5259 5257 5256 5255 5254 5253 5252 5251 5250 5249 5248 5247 5246 5245 5244                                                                              5243 5242 5241 5240 5239 5238 5237 5236 5235 5234 5233 5232 5231 5230 5229 5228                                                                              5227 5226 5225 5224 5223 5222 5221 5220 5219 5218 5217 5216 5215 5213 5212 5211                                                                              5210 5209 5208 5207 5206 5205 5204 5203 5202 5201 5200 5199 5198 5197 5196 5195                                                                              5194 5193 5192 5191 5190 5189 5188 5187 5186 5185 5184 5183 5182 5180 5179 5177                                                                              5176 5175 5174 5173 5172 5171 5170 5169 5168 5167 5166 5165 5164 5163 5162 5161                                                                              5160 5159 5158 5157 5156 5155 5154 5153 5152 5151 5150 5149 5148 5147 5146 

I am connecting this to a backend jboss server using JKmodule

i have another server with the same httpd config which works fine.

but on this server the pid does not close and finally request stops responding.

need help

Regards Pramod