Authentication Issue & Check Regex Issue Using Gatling - scala

Question

Want to Perform Load testing on Salesforce Platform. But it seems there is an error in authentication as well as regex part.
I am using Gatling testing tool & scala programming here.
If you guide me how to do load testing on salesforce that would be plus.
This is my code:
package default
import scala.concurrent.duration._
import io.gatling.core.Predef._
import io.gatling.http.Predef._
import io.gatling.jdbc.Predef._
import io.gatling.core.Predef._
class requestUser extends Simulation {
val httpProtocol = http.baseURL("http://login.salesforce.com")
val Test = exec(http("Login")
.get("/")
.basicAuth("abc#gmail.com", "Password+Token")
.formParam("sessionId","*******")
.formParam("orgId","***********")
)
.exec(http("acc")
.get("/path")
.basicAuth("abc#gmail.com", "Password+Token")
.check(status.is(200))
**.check(css("#content"))
.check(regex("""<div id ="header">Choose a Username</div>"""))
.check(regex("""<td class = "datacell">Jaipur</td>"""))**
)
.exec(http("home")
.post("/home/home.jsp")
.formParam("Post", "Test from Gatling")
.check(regex())
)
var scn = scenario("scn").exec(Test)
setUp(
scn.inject(rampUsers(1) over (10 seconds))
).protocols(httpProtocol)
}