i've a problem with my oracle developer 10g when i'm trying to launch  the program it's opening slowly and showing message during a minute forms builder not respondign

how i can handle that 

appreciated

The file rwserver.conf for your reports server contains configuration information where you can change different settings of the rwEng such as the reports engine settings. The following information provides some recommended settings for your reports engine. NOTE: Depending on the number of reports being run along with the number of users running reports simultaneously, the settings might need to be modified especially for a production environment.
minEngine=0
maxEngine=# of CPU cores x2 (A single core machine should be 2, dual core should be 4, quad core should be 8 but can be 16)
engLife=10 (5 or 1 can also work depending on the environment)
maxIdle=30
jvmOptions=”-Xms512m -Xmx512m”
Job retries=3
Also, set:
maxConnections=# of end users (200 is a safe number for development servers)
KeepConnection=no

Example in rwserver.conf: